I also had a problem with .kde in root earlier in my F17 adventure.
removed the .kde folder in root and have had no problems with it since.
The solution was given by Dan Walsh in comment 15 of this Bugzilla:
According to Dan, it was a bug in KDE.
That's a completely different bug, it's about a /.kde folder in the root of
the file system hierarchy (NOT in root's home directory), which is indeed a
KDE bug (/root/.kde is where it SHOULD be).